{"id":54587,"date":"2019-12-29T00:00:00","date_gmt":"2019-12-28T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/delimsya-opytom-kak-pokazyvayut-sebya-ssd-v-ramkah-raid-i-kakoj-uroven-massiva-vygodnee"},"modified":"2020-02-18T14:02:37","modified_gmt":"2020-02-18T11:02:37","slug":"delimsya-opytom-kak-pokazyvayut-sebya-ssd-v-ramkah-raid-i-kakoj-uroven-massiva-vygodnee","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/administrirovanie\/delimsya-opytom-kak-pokazyvayut-sebya-ssd-v-ramkah-raid-i-kakoj-uroven-massiva-vygodnee","title":{"rendered":"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/kingston_technology\/blog\/482068\/\">kor\u00e1bbi anyagban<\/a><\/noindex> m\u00e1r foglalkoztunk azzal a k\u00e9rd\u00e9ssel, hogy \u201eHaszn\u00e1lhat\u00f3-e a RAID SSD-ken\u201d a Kingston meghajt\u00f3k p\u00e9ld\u00e1j\u00e1n kereszt\u00fcl, de ezt csak a nulladik szinten tett\u00fck. A jelenlegi cikkben a professzion\u00e1lis \u00e9s otthoni NVMe megold\u00e1sok RAID t\u00f6mbjeinek legn\u00e9pszer\u0171bb t\u00edpusait fogjuk \u00e1ttekinteni \u00e9s besz\u00e9lni fogunk a vez\u00e9rl\u0151k kompatibilit\u00e1s\u00e1r\u00f3l. <noindex><a rel=\"nofollow\" href=\"https:\/\/bit.ly\/2PZv3gF\">Broadcom<\/a><\/noindex> a Kingston meghajt\u00f3kkal.<\/p>\n<p><img decoding=\"async\" alt=\"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb\" src=\"\/wp-content\/uploads\/2019\/12\/fae4c705202323e4495175e6c34d5592.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>Mi\u00e9rt sz\u00fcks\u00e9ges a RAID SSD-n?<\/h2>\n<p>\nAz SSD alap\u00fa t\u00e1rol\u00f3t\u00f6mb\u00f6k el\u0151nyei a merevlemez alap\u00fa t\u00e1rol\u00f3kkal szemben k\u00f6z\u00e9 tartozik az adatokhoz val\u00f3 hozz\u00e1f\u00e9r\u00e9si id\u0151 cs\u00f6kken\u00e9se \u00e9s a kiv\u00e1l\u00f3 teljes\u00edtm\u00e9ny a read\/write m\u0171veletek sor\u00e1n. Az SSD alap\u00fa RAID t\u00f6k\u00e9letes teljes\u00edtm\u00e9ny\u00e9hez azonban optim\u00e1lis CPU, Cache, szoftver \u00e9s hardver kombin\u00e1ci\u00f3 sz\u00fcks\u00e9ges. Amikor ezek a t\u00e9nyez\u0151k t\u00f6k\u00e9letesen m\u0171k\u00f6dnek egy\u00fctt, az SSD-kb\u0151l k\u00e9sz\u00fclt RAID t\u00f6mb jelent\u0151sen fel\u00fclm\u00falhatja a hasonl\u00f3 konfigur\u00e1ci\u00f3t, amely hagyom\u00e1nyos HDD-ket alkalmaz.<\/p>\n<p>A tipikus SSD kevesebb energi\u00e1t fogyaszt, mint a merevlemezek, ez\u00e9rt ha nagy sz\u00e1m\u00fa SSD-t egy RAID t\u00f6mbbe integr\u00e1lunk, az energia megtakar\u00edt\u00e1s a HDD-s RAID t\u00f6mbbel szemben cs\u00f6kkentheti a v\u00e1llalati villanysz\u00e1ml\u00e1kat.<\/p>\n<p>Azonban az SSD RAID-nek vannak korl\u00e1tai \u00e9s h\u00e1tr\u00e1nyai is: f\u0151k\u00e9nt a gigab\u00e1jtok \u00e1ra, amely magasabb a hasonl\u00f3 kapacit\u00e1s\u00fa merevlemezekhez k\u00e9pest. Ezenk\u00edv\u00fcl a flash mem\u00f3ria \u00e9lettartama korl\u00e1tozott a fel\u00edr\u00e1si ciklusok sz\u00e1m\u00e1val. Ez\u00e9rt az SSD meghajt\u00f3knak van egy bizonyos \u00e9lettartama, amely a felhaszn\u00e1l\u00e1st\u00f3l f\u00fcgg: min\u00e9l akt\u00edvabban \u00edr\u00f3dik fel az inform\u00e1ci\u00f3, ann\u00e1l gyorsabban megy t\u00f6nkre a meghajt\u00f3. M\u00e1sr\u00e9szt, a v\u00e1llalati SSD-k megfelel\u0151 \u00e9lettartammal rendelkeznek, amely \u00f6sszehasonl\u00edthat\u00f3 a mechanikai merevlemezek\u00e9vel.<\/p>\n<h2>Hogyan teljes\u00edtenek a Kingston SSD-k RAID m\u00f3dban a Broadcom vez\u00e9rl\u0151kkel<\/h2>\n<p>\nAz SSD-meghajt\u00f3k megjelen\u00e9s\u00e9nek hajnal\u00e1n a RAID-konstrukci\u00f3k sz\u00e1mos \u00e1rnyalatot rejtek a magukban. Ez r\u00e9szben a megb\u00edzhatatlanabb HDD-lemezek haszn\u00e1lat\u00e1nak k\u00f6sz\u00f6nhet\u0151. A szil\u00e1rdtest-alap\u00fa meghajt\u00f3k sokkal megb\u00edzhat\u00f3bbak m\u00e1gneses lemezekb\u0151l k\u00e9sz\u00fclt t\u00e1rsaikn\u00e1l. Mint tudjuk, az SSD-megold\u00e1sokn\u00e1l nincsenek mozg\u00f3 alkatr\u00e9szek, \u00edgy a mechanikai s\u00e9r\u00fcl\u00e9sek kock\u00e1zata minim\u00e1lisra cs\u00f6kken. Az is val\u00f3sz\u00edn\u0171tlen, hogy az SSD-meghajt\u00f3k fesz\u00fclts\u00e9gingadoz\u00e1sok k\u00f6vetkezt\u00e9ben meghib\u00e1sodjanak, figyelembe v\u00e9ve, hogy otthoni PC-n \u00e9s b\u00e1rmely szerveren az UPS, h\u00e1l\u00f3zati sz\u0171r\u0151k, s\u0151t m\u00e9g a t\u00e1pegys\u00e9g is v\u00e9delmet ny\u00fajtanak.<\/p>\n<p>Ezenk\u00edv\u00fcl a szil\u00e1rdtest-alap\u00fa meghajt\u00f3knak van egy m\u00e1sik jelent\u0151s el\u0151ny\u00fck: m\u00e9g ha a mem\u00f3ria cell\u00e1k az \u00edr\u00e1s sor\u00e1n elhaszn\u00e1l\u00f3dnak is, az adatok olvas\u00e1sa t\u0151l\u00fck tov\u00e1bbra is lehets\u00e9ges, m\u00edg a m\u00e1gneses lemez s\u00e9r\u00fcl\u00e9se eset\u00e9n ez sajnos nem val\u00f3s\u00edthat\u00f3 meg.<\/p>\n<p><img decoding=\"async\" alt=\"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb\" src=\"\/wp-content\/uploads\/2019\/12\/b9c23f2e9f230920df016639749f4afe.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nManaps\u00e1g teljesen norm\u00e1lis gyakorlat SSD-megold\u00e1sokat haszn\u00e1lni k\u00fcl\u00f6nb\u00f6z\u0151 szint\u0171 RAID t\u00f6mb\u00f6kben. A legfontosabb az, hogy megfelel\u0151 szil\u00e1rdtest-alap\u00fa meghajt\u00f3kat v\u00e1lasszunk, amelyek k\u00e9sleltet\u00e9se minim\u00e1lis. Ide\u00e1lis esetben egy gy\u00e1rt\u00f3 \u00e9s egy modell SSD-it \u00e9rdemes haszn\u00e1lni, hogy ne keveredjen \u00f6ssze a k\u00fcl\u00f6nb\u00f6z\u0151 terhel\u00e9s-t\u00edpusokat t\u00e1mogat\u00f3 meghajt\u00f3k, amelyek m\u00e1s-m\u00e1s mem\u00f3ria, vez\u00e9rl\u0151 \u00e9s egy\u00e9b technol\u00f3gi\u00e1k alapj\u00e1n k\u00e9sz\u00fcltek. Teh\u00e1t ha m\u00e1r \u00fagy d\u00f6nt\u00f6tt\u00fcnk, hogy n\u00e9gy vagy 16 NVMe SSD-t v\u00e1s\u00e1rolunk a Kingston-t\u00f3l a RAID t\u00f6mb l\u00e9trehoz\u00e1s\u00e1hoz, akkor ink\u00e1bb az \u00f6sszes ugyanabb\u00f3l a sorozatb\u00f3l \u00e9s modellb\u0151l legyen. <\/p>\n<p>Egy\u00e9bk\u00e9nt, a <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/kingston_technology\/blog\/482068\/\">el\u0151z\u0151 cikkben<\/a><\/noindex> Nem v\u00e9letlen\u00fcl emlegett\u00fck a Broadcom vez\u00e9rl\u0151it, amikor a Kingston NVMe SSD-kr\u0151l besz\u00e9lt\u00fcnk. Az a helyzet, hogy ezeknek az eszk\u00f6z\u00f6knek a k\u00e9zik\u00f6nyv\u00e9ben azonnal felt\u00fcntetik a kompatibilis meghajt\u00f3kat (bele\u00e9rtve a fent eml\u00edtett amerikai gy\u00e1rt\u00f3 SSD-megold\u00e1sait), amelyekkel a vez\u00e9rl\u0151 probl\u00e9m\u00e1k n\u00e9lk\u00fcl m\u0171k\u00f6dik. Ezen inform\u00e1ci\u00f3k alapj\u00e1n kell v\u00e1lasztani a 'vez\u00e9rl\u0151-SSD' p\u00e1rost RAID-hoz.<\/p>\n<h2>Vizsg\u00e1ljuk meg a Kingston SSD-k m\u0171k\u00f6d\u00e9s\u00e9t a legn\u00e9pszer\u0171bb RAID-t\u00edpusokban \u2014 '1', '5', '10', '50'.<\/h2>\n<p>\nTeh\u00e1t a RAID \u201enulla\u201d szint nem biztos\u00edt adatredundanci\u00e1t, csup\u00e1n n\u00f6veli a teljes\u00edtm\u00e9nyt. A RAID 0 egy\u00e1ltal\u00e1n nem ny\u00fajt adatv\u00e9delmet, ez\u00e9rt nem foglalkozunk vele a v\u00e1llalati szegmensben. A RAID 1 viszont teljes redundanci\u00e1t biztos\u00edt, de csak szer\u00e9ny teljes\u00edtm\u00e9nyn\u00f6veked\u00e9st ny\u00fajt, \u00edgy akkor \u00e9rdemes m\u00e9rlegelni, ha a teljes\u00edtm\u00e9nyn\u00f6vel\u00e9s nem alapvet\u0151 szempont az SSD-b\u0151l k\u00e9sz\u00fclt RAID t\u00f6mb l\u00e9trehoz\u00e1s\u00e1n\u00e1l.<\/p>\n<h2>RAID 1 Kingston SSD-k \u00e9s Broadcom vez\u00e9rl\u0151k alapj\u00e1n<\/h2>\n<p>\nTeh\u00e1t a RAID 1 t\u00f6mb a Broadcom MegaRAID 9460-16i vez\u00e9rl\u0151n\u00e9l 2-t\u0151l 32-ig terjed\u0151 Kingston t\u00e1rol\u00f3egys\u00e9gekb\u0151l \u00e1ll, amelyek egym\u00e1s m\u00e1solatai, \u00e9s teljes redundanci\u00e1t biztos\u00edt. M\u00edg a hagyom\u00e1nyos HDD-k haszn\u00e1latakor az adatok \u00edr\u00e1s\u00e1nak \u00e9s olvas\u00e1s\u00e1nak sebess\u00e9ge a HDD szintj\u00e9n maradt, az NVMe SSD-megold\u00e1sok haszn\u00e1lat\u00e1val t\u00edzszeres teljes\u00edtm\u00e9nyn\u00f6veked\u00e9st \u00e9rhet\u00fcnk el. K\u00fcl\u00f6n\u00f6sen az adatokhoz val\u00f3 hozz\u00e1f\u00e9r\u00e9s ideje ter\u00e9n. P\u00e9ld\u00e1ul k\u00e9t Kingston DC1000M U.2 NVMe SSD-t alkalmazva a szerver RAID 1-ben 350 000 IOPS-t kapunk v\u00e9letlenszer\u0171 adatok olvas\u00e1sakor \u00e9s 75 000 IOPS-t \u00edr\u00e1skor. <\/p>\n<p><img decoding=\"async\" alt=\"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb\" src=\"\/wp-content\/uploads\/2019\/12\/f619b356b7aa68e1a4d62b6d33a2c8f0.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA soros olvas\u00e1si sebess\u00e9g szempontj\u00e1b\u00f3l az eredm\u00e9nyek a t\u00e1rol\u00f3 specifik\u00e1ci\u00f3inak megfelel\u0151en alakulnak \u2014 3200 MB\/s. Azonban mivel mindk\u00e9t NVMe SSD akt\u00edv \u00e1llapotban van, az adatok egyidej\u0171leg olvashat\u00f3k r\u00f3luk, ami az olvas\u00e1si m\u0171veleteket meglehet\u0151sen gyorss\u00e1 teszi. Az \u00edr\u00e1s sebess\u00e9ge (amelynek megadott \u00e9rt\u00e9ke 2000 MB\/s) viszont lassabb lesz, mivel minden \u00edr\u00e1si m\u0171veletet k\u00e9tszer kell v\u00e9grehajtani. <\/p>\n<p><img decoding=\"async\" alt=\"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb\" src=\"\/wp-content\/uploads\/2019\/12\/ad2fa91fb846c69f8afa5fe8d0f08b16.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA RAID 1 t\u00f6mb t\u00f6k\u00e9letes a kis adatb\u00e1zisok sz\u00e1m\u00e1ra vagy b\u00e1rmely m\u00e1s k\u00f6rnyezethez, amely megb\u00edzhat\u00f3s\u00e1got k\u00f6vetel, de kis kapacit\u00e1ssal b\u00edr. A t\u00e1rol\u00f3k t\u00fck\u00f6rm\u00e1sol\u00e1sa k\u00fcl\u00f6n\u00f6sen hasznos katasztr\u00f3fa-helyre\u00e1ll\u00edt\u00e1si forgat\u00f3k\u00f6nyvekben (ez esetben a teljes\u00edtm\u00e9ny kiss\u00e9 cs\u00f6kken), mivel azonnali \u201e\u00fajra\u00e9leszt\u00e9st\u201d biztos\u00edt a fontos adatok sz\u00e1m\u00e1ra, ha az egyik t\u00e1rol\u00f3 meghib\u00e1sodik a t\u00f6mbben. Azonban mivel ez a v\u00e9delmi szint megk\u00f6veteli a t\u00e1rol\u00f3kapacit\u00e1s megdupl\u00e1z\u00e1s\u00e1t, hogy l\u00e9trej\u00f6jj\u00f6n a t\u00fck\u00f6rm\u00e1solat (100 TB t\u00e1rol\u00e1s\u00e1hoz 200 TB hely sz\u00fcks\u00e9ges), sok v\u00e1llalati rendszerben k\u00f6lts\u00e9ghat\u00e9konyabb t\u00e1rol\u00e1si lehet\u0151s\u00e9geket alkalmaznak: RAID 5 \u00e9s RAID 6.<\/p>\n<h2>RAID 5 Kingston SSD-k \u00e9s Broadcom vez\u00e9rl\u0151k alapj\u00e1n<\/h2>\n<p>\nA RAID 5 array requires at least three drives, where data is striped (cyclically written across all drives in the array) rather than duplicated. When organizing them, one must consider their more complex structure, as the concept of 'parity' (or 'checksum') comes into play. This refers to the logical algebraic function XOR (exclusive 'OR'), which dictates the use of a minimum of three drives in the array (maximum \u2013 32). The parity information is written across all the 'disks' in the array.<\/p>\n<p><img decoding=\"async\" alt=\"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb\" src=\"\/wp-content\/uploads\/2019\/12\/1b256a9708dd60490682b7d72d33a2a7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nFor an array of four Kingston DC500R SATA SSDs, each with a capacity of 3.84 TB, we would get 11.52 TB of space and 3.84 TB for parity. If we combine 16 Kingston DC1000M U.2 NVMe drives with a capacity of 7.68 TB in a RAID 5 configuration, we achieve 115.2 TB with a loss of 7.68 TB. As you can see, the more drives there are, the better the outcome. It\u2019s also better because the more drives in RAID 5, the higher the overall performance during write operations. Linear reading will reach the RAID 0 level.<\/p>\n<p><img decoding=\"async\" alt=\"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb\" src=\"\/wp-content\/uploads\/2019\/12\/33daad3940464c97e3f34cb3c943e1ec.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA RAID 5 disk group provides high throughput (especially for large files) and redundancy with minimal power loss. This type of array organization is best suited for networks that perform many small input\/output (I\/O) operations simultaneously. However, it is not advisable to use it for tasks that require a large number of write operations for small or tiny blocks. <br \/>\nThere is also one more nuance: if at least one of the NVMe drives fails, RAID 5 enters a degraded mode, and failure of another storage device can be critical for all data. In case of a drive failure in the RAID array, the RAID controller uses parity information to recreate all the missing data.<\/p>\n<h2>RAID 10 based on Kingston SSDs and Broadcom controllers<\/h2>\n<p>\nA RAID 0 teh\u00e1t k\u00e9tszeres sebess\u00e9gn\u00f6veked\u00e9st \u00e9s gyorsabb el\u00e9r\u00e9st biztos\u00edt, m\u00edg a RAID 1 megb\u00edzhat\u00f3s\u00e1got ny\u00fajt. Ide\u00e1lis esetben kombin\u00e1lni kellene \u0151ket, \u00e9s ebben seg\u00edt a RAID 10 (vagy 1+0). A \u201et\u00edzes\u201d n\u00e9gy SATA SSD- vagy NVMe-meghajt\u00f3b\u00f3l (maximum 32) \u00e1ll, \u00e9s a t\u00fckr\u00f6z\u00f6tt k\u00e9szletek sz\u00e1m\u00e1nak mindig n\u00e9ggyel kell oszthat\u00f3nak lennie. Az adatok ebben a t\u00f6mbben fix blokkokra bontva (mint a RAID 0 eset\u00e9ben) \u00e9s a meghajt\u00f3k k\u00f6z\u00f6tt v\u00e1ltakozva ker\u00fclnek r\u00f6gz\u00edt\u00e9sre, megosztva a m\u00e1solatokat a RAID 1 t\u00f6mb \u201elemezei\u201d k\u00f6z\u00f6tt. A RAID 10 a t\u00f6bb csoportos meghajt\u00f3hoz val\u00f3 egyidej\u0171 hozz\u00e1f\u00e9r\u00e9s lehet\u0151s\u00e9ge miatt magas teljes\u00edtm\u00e9nyt ny\u00fajt.<\/p>\n<p><img decoding=\"async\" alt=\"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb\" src=\"\/wp-content\/uploads\/2019\/12\/4569c6bb905116f96c2ae24c1e7b3fee.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nMivel a RAID 10 k\u00e9pes az adatokat t\u00f6bb t\u00fck\u00f6rp\u00e1r k\u00f6z\u00f6tt elosztani, ez azt jelenti, hogy megengedheti mag\u00e1nak egy meghajt\u00f3 meghib\u00e1sod\u00e1s\u00e1t a p\u00e1rban. Azonban ha mindk\u00e9t t\u00fck\u00f6rp\u00e1r (azaz mind a n\u00e9gy meghajt\u00f3) meghib\u00e1sodik, elker\u00fclhetetlen adatveszt\u00e9s k\u00f6vetkezik be. Ennek eredm\u00e9nyek\u00e9nt j\u00f3 hibat\u0171r\u00e9st \u00e9s megb\u00edzhat\u00f3s\u00e1got is ny\u00fajt. De \u00e9rdemes figyelembe venni, hogy a RAID 1-hez hasonl\u00f3an a tizedik szint\u0171 t\u00f6mb is csak a teljes kapacit\u00e1s fel\u00e9t haszn\u00e1lja, \u00edgy dr\u00e1ga megold\u00e1snak sz\u00e1m\u00edt. R\u00e1ad\u00e1sul nehezen be\u00e1ll\u00edthat\u00f3. <\/p>\n<p>A RAID 10 olyan adatt\u00e1rol\u00f3k sz\u00e1m\u00e1ra alkalmas, akiknek 100%-os redundanci\u00e1ra van sz\u00fcks\u00e9ge a t\u00fck\u00f6rlemezek csoportj\u00e1val, valamint a RAID 0-n\u00e1l n\u00f6velt bemeneti\/kimeneti teljes\u00edtm\u00e9nyre. Ez a legjobb megold\u00e1s k\u00f6zepes m\u00e9ret\u0171 adatb\u00e1zisok sz\u00e1m\u00e1ra, vagy b\u00e1rmely olyan k\u00f6rnyezethez, amely magasabb hibat\u0171r\u00e9st k\u00f6vetel, mint a RAID 5.<\/p>\n<h2>RAID 50 Kingston SSD-k \u00e9s Broadcom vez\u00e9rl\u0151k alapj\u00e1n<\/h2>\n<p>\nKombin\u00e1lt t\u00f6mb, amely hasonl\u00f3 a RAID 10-hez, \u00e9s egy nullaszintrendszerb\u0151l \u00e1ll, amely \u00f6t\u00f6dik szint\u0171 t\u00f6mb\u00f6kb\u0151l \u00e9p\u00fcl fel. Mint kor\u00e1bban, a f\u0151 c\u00e9l az, hogy dupl\u00e1zza a teljes\u00edtm\u00e9nyt, mik\u00f6zben meg\u0151rzi az adatok megb\u00edzhat\u00f3s\u00e1g\u00e1t a RAID 5 t\u00f6mb\u00f6kben. A RAID 50 jobb \u00edr\u00e1si teljes\u00edtm\u00e9nyt \u00e9s er\u0151sebb adatv\u00e9delmet biztos\u00edt, mint a standard RAID 5, ha egy meghajt\u00f3 meghib\u00e1sodik, \u00e9s gyorsabb helyre\u00e1ll\u00edt\u00e1st tesz lehet\u0151v\u00e9 egy meghajt\u00f3 hib\u00e1ja eset\u00e9n.<\/p>\n<p><img decoding=\"async\" alt=\"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb\" src=\"\/wp-content\/uploads\/2019\/12\/7dc44c69ace41c97c131a0b1f1fb4659.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA RAID 50 disk group splits data into smaller blocks and distributes them across each RAID 5 array. The RAID 5 disk group also breaks data into smaller blocks, calculates parity, performs an OR logical operation on the blocks, and then writes to the data blocks and parity checks for each disk in the group.<\/p>\n<p>And while performance inevitably decreases if one of the drives fails, it is not as significant as in a RAID 5 array, since one failure affects only one of the arrays, leaving the other fully operational. In fact, RAID 50 can withstand up to eight HDD\/SSD\/NVMe drive failures, provided that each failed \u201cdisk\u201d is in a separate RAID 5 array.<\/p>\n<p><img decoding=\"async\" alt=\"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb\" src=\"\/wp-content\/uploads\/2019\/12\/e5562a345390b43339bcc2eff057e2da.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nRAID 50 is best used for applications that require high reliability and need to handle a large number of requests while maintaining a high data transfer rate and a lower cost of drives than in a RAID 10 array. However, since a minimum of six drives is required to set up a RAID 50 array, cost cannot be completely disregarded as a factor. One of the drawbacks of RAID 50 is that, like RAID 5, it requires a complex controller such as <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/kingston_technology\/blog\/482068\/\">the one we mentioned<\/a><\/noindex> az el\u0151z\u0151 cikkben <noindex><a rel=\"nofollow\" href=\"https:\/\/www.broadcom.com\/products\/storage\/raid-controllers\/megaraid-9460-16i\">MegaRAID 9460-16i<\/a><\/noindex> from Broadcom.<\/p>\n<p>It is also worth noting that RAID 50 has less usable disk space than RAID 5 due to the allocation of capacity for parity records. However, it still provides more usable space than other RAID levels, especially those that use mirroring. With a minimum requirement of six disks, RAID 50 can be an expensive option, but the additional disk space justifies the costs by protecting corporate data. This type of array is recommended for working with data that requires high storage reliability, high request frequency, high transfer rates, and large capacity for storage.<\/p>\n<h2>RAID 6 and RAID 60: we haven't forgotten about them either<\/h2>\n<p>\nSince we've talked about the fifth and fiftieth level arrays, it's a shame not to mention RAID 6 and RAID 60 types of array organization.<\/p>\n<p><img decoding=\"async\" alt=\"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb\" src=\"\/wp-content\/uploads\/2019\/12\/384bc6b19ccb498a985f3e1babe17be3.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nA RAID 6 teljes\u00edtm\u00e9nye hasonl\u00f3 a RAID 5-\u00f6s\u00e9hez, de itt legal\u00e1bb k\u00e9t meghajt\u00f3t haszn\u00e1lnak parit\u00e1s kezel\u00e9s\u00e9re, ami lehet\u0151v\u00e9 teszi, hogy a t\u00f6mb k\u00e9t meghajt\u00f3 meghib\u00e1sod\u00e1s\u00e1t is t\u00fal\u00e9ld an\u00e9lk\u00fcl, hogy adatveszt\u00e9s t\u00f6rt\u00e9nne (RAID 5 eset\u00e9n az ilyen helyzet rendk\u00edv\u00fcl nem k\u00edv\u00e1natos). Ennek k\u00f6sz\u00f6nhet\u0151en nagyobb megb\u00edzhat\u00f3s\u00e1got biztos\u00edt. A t\u00f6bbi r\u00e9sz ugyanaz, mint az \u00f6t\u00f6dik szint\u0171 t\u00f6mbn\u00e9l: ha egy vagy k\u00e9t lemez hib\u00e1t jelez, a RAID vez\u00e9rl\u0151 a parit\u00e1s blokkokat haszn\u00e1lja, hogy helyre\u00e1ll\u00edtsa az \u00f6sszes hi\u00e1nyz\u00f3 inform\u00e1ci\u00f3t. K\u00e9t meghajt\u00f3 meghib\u00e1sod\u00e1sa eset\u00e9n a helyre\u00e1ll\u00edt\u00e1s nem egyszerre t\u00f6rt\u00e9nik: el\u0151sz\u00f6r az els\u0151 meghajt\u00f3t \u00e1ll\u00edtj\u00e1k helyre, majd a m\u00e1sodikat. \u00cdgy k\u00e9t adat-helyre\u00e1ll\u00edt\u00e1si m\u0171veletet v\u00e9geznek.<\/p>\n<p><img decoding=\"async\" alt=\"Megosztjuk tapasztalatainkat arr\u00f3l, hogyan teljes\u00edtenek az SSD-k RAID keretein bel\u00fcl \u00e9s melyik t\u00f6mbszint a legel\u0151ny\u00f6sebb\" src=\"\/wp-content\/uploads\/2019\/12\/e89a94b01464061688c12727b02a3560.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nK\u00f6nnyen kital\u00e1lhat\u00f3, hogy ha a RAID 50 egy nulladik szint\u0171 t\u00f6mb az \u00f6t\u00f6dik szint\u0171 t\u00f6mb\u00f6kb\u0151l, akkor a RAID 60 egy nulladik szint\u0171 t\u00f6mb a hatodik szint\u0171 t\u00f6mb\u00f6kb\u0151l, amelyeket most eml\u00edtett\u00fcnk. Ez a RAID t\u00e1rol\u00e1si szervez\u00e9s lehet\u0151v\u00e9 teszi, hogy minden RAID 6 csoportban k\u00e9t SSD meghib\u00e1sod\u00e1s\u00e1t t\u00fal\u00e9lje. A m\u0171k\u00f6d\u00e9si elv hasonl\u00f3 ahhoz, amelyet a RAID 50 szakaszban t\u00e1rgyaltunk, de a hatodik szint\u0171 t\u00f6mb 8 meghajt\u00f3r\u00f3l 16-ra emeli a hib\u00e1k sz\u00e1m\u00e1t, amelyet elviselni tud. Az ilyen t\u00f6mb\u00f6k \u00e1ltal\u00e1ban olyan online \u00fcgyf\u00e9lszolg\u00e1latra vannak haszn\u00e1lva, amely magas rendelkez\u00e9sre \u00e1ll\u00e1st ig\u00e9nyel.<\/p>\n<h2>\u00d6sszefoglalva:<\/h2>\n<p>\nB\u00e1r a t\u00fckr\u00f6z\u00e9s nagyobb rendelkez\u00e9sre \u00e1ll\u00e1st biztos\u00edt a RAID 50\/60-hoz k\u00e9pest, sokkal nagyobb helyet is ig\u00e9nyel. Mivel az adatok mennyis\u00e9ge megdupl\u00e1z\u00f3dik, a szerverben telep\u00edtett meghajt\u00f3k \u00f6sszes kapacit\u00e1s\u00e1nak csak 50%-\u00e1t kapja meg az inform\u00e1ci\u00f3k \u00edr\u00e1s\u00e1ra \u00e9s t\u00e1rol\u00e1s\u00e1ra. A v\u00e1laszt\u00e1s a RAID 50\/60 \u00e9s a RAID 10 k\u00f6z\u00f6tt val\u00f3sz\u00edn\u0171leg a rendelkez\u00e9sre \u00e1ll\u00f3 k\u00f6lts\u00e9gkeretek, a szerver kapacit\u00e1sa \u00e9s az adatok v\u00e9delm\u00e9re vonatkoz\u00f3 ig\u00e9nyek alapj\u00e1n fog megt\u00f6rt\u00e9nni. A k\u00f6lts\u00e9gek k\u00fcl\u00f6n\u00f6sen fontosak, ha SSD megold\u00e1sokr\u00f3l besz\u00e9l\u00fcnk (\u00fczleti \u00e9s fogyaszt\u00f3i szinten is).<\/p>\n<p>Nem kev\u00e9sb\u00e9 fontos, hogy most m\u00e1r tudjuk \u2013 a SSD alap\u00fa RAID egy teljesen biztons\u00e1gos megold\u00e1s \u00e9s norm\u00e1lis gyakorlat a modern \u00fczleti \u00e9let sz\u00e1m\u00e1ra. A h\u00e1ztart\u00e1si alkalmaz\u00e1sok eset\u00e9n is indokolt lehet az NVMe-re val\u00f3 \u00e1tt\u00e9r\u00e9s, ha a k\u00f6lts\u00e9gkeretek megengedik. Ha pedig m\u00e9g mindig van k\u00e9rd\u00e9se, hogy mindez mi\u00e9rt sz\u00fcks\u00e9ges, t\u00e9rjen vissza a cikk elej\u00e9re \u2013 m\u00e1r r\u00e9szletesen v\u00e1laszoltunk r\u00e1.<\/p>\n<p>Ez a cikk a Broadcom munkat\u00e1rsainak t\u00e1mogat\u00e1s\u00e1val k\u00e9sz\u00fclt, akik m\u00e9rn\u00f6keik sz\u00e1m\u00e1ra SATA\/SAS\/NVMe v\u00e1llalati szint\u0171 t\u00e1rol\u00f3kkal tesztel\u00e9sre biztos\u00edtj\u00e1k az ir\u00e1ny\u00edt\u00f3ikat. Ennek a bar\u00e1ti szimbi\u00f3zisnak k\u00f6sz\u00f6nhet\u0151en az \u00fcgyfeleknek nem kell k\u00e9telkedni\u00fck a Kingston t\u00e1rol\u00f3k megb\u00edzhat\u00f3s\u00e1g\u00e1ban \u00e9s stabilit\u00e1s\u00e1ban HBA- \u00e9s RAID-vez\u00e9rl\u0151kkel. <noindex><a rel=\"nofollow\" href=\"https:\/\/bit.ly\/2PZv3gF\">Broadcom<\/a><\/noindex>.<\/p>\n<p>Tov\u00e1bbi inform\u00e1ci\u00f3 a Kingston term\u00e9keir\u0151l itt tal\u00e1lhat\u00f3: <noindex><a rel=\"nofollow\" href=\"https:\/\/kings.tn\/HabrRaidCompany\">hivatalos oldalon<\/a><\/noindex> a c\u00e9ggel.<br \/>\n<br \/>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/kingston_technology\/blog\/482248\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043f\u0440\u043e\u0448\u043b\u043e\u043c \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0435 \u043c\u044b \u0443\u0436\u0435 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0435\u043b\u0438 \u0432\u043e\u043f\u0440\u043e\u0441 \u043e \u0442\u043e\u043c \u201c\u041f\u0440\u0438\u043c\u0435\u043d\u0438\u043c \u043b\u0438 RAID \u043d\u0430 SSD\u201d \u043d\u0430 \u043f\u0440\u0438\u043c\u0435\u0440\u0435 \u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u0435\u0439 Kingston, \u043d\u043e \u0441\u0434\u0435\u043b\u0430\u043b\u0438 \u044d\u0442\u043e \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0440\u0430\u043c\u043a\u0430\u0445 \u043d\u0443\u043b\u0435\u0432\u043e\u0433\u043e \u0443\u0440\u043e\u0432\u043d\u044f. \u0412 \u0442\u0435\u043a\u0443\u0449\u0435\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u043c\u044b \u0440\u0430\u0437\u0431\u0435\u0440\u0435\u043c \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u0440\u043e\u0444\u0435\u0441\u0441\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0445 \u0438 \u0434\u043e\u043c\u0430\u0448\u043d\u0438\u0445 NVMe-\u0440\u0435\u0448\u0435\u043d\u0438\u0439 \u0432 \u0441\u0430\u043c\u044b\u0445 \u043f\u043e\u043f\u0443\u043b\u044f\u0440\u043d\u044b\u0445 \u0442\u0438\u043f\u0430\u0445 RAID-\u043c\u0430\u0441\u0441\u0438\u0432\u043e\u0432 \u0438 \u0440\u0430\u0441\u0441\u043a\u0430\u0436\u0435\u043c \u043e \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u0438 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u043e\u0432 Broadcom \u0441 \u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u044f\u043c\u0438 Kingston. \u0417\u0430\u0447\u0435\u043c \u043d\u0443\u0436\u0435\u043d RAID \u043d\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-54587","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 \u043f\u0440\u043e\u0448\u043b\u043e\u043c \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0435 \u043c\u044b \u0443\u0436\u0435 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0435\u043b\u0438 \u0432\u043e\u043f\u0440\u043e\u0441 \u043e \u0442\u043e\u043c \u201c\u041f\u0440\u0438\u043c\u0435\u043d\u0438\u043c \u043b\u0438 RAID \u043d\u0430 SSD\u201d \u043d\u0430 \u043f\u0440\u0438\u043c\u0435\u0440\u0435 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